Is this what product-market fit feels like?

I've reached episode #003 of my podcast The Last Theory, and already I'm getting:

• hundreds of views / episode on YouTube
• dozens of comments on YouTube
• messages from people wanting to tell me their theories as if I'm an expert (I'm not).

This is after zero effort to publicize my podcast.

Why? My best guess:

1. I've focused on a narrow niche (Stephen Wolfram's project to find the fundamental theory of physics)
2. I've kept it short (~8 minutes / episode) and simple (I put a lot of work into making those 8 minutes as clear as I can)
3. there's really not much out there on the subject (other than Stephen Wolfram's own content, which is far from short and far from simple).

It's a good feeling, one I've never felt in all my years of putting out products and content.

Have you ever felt that pull from the market?